We use molecular statics simulations with the tight-binding potential to analyze stress evolution in nanosize square prismatic gold specimens of different aspect ratios (length/width) deformed in either simple tension/compression or tension/compression. In the former case atoms on end faces are displaced axially but are free to move laterally, and in the latter case atoms on end faces are restr...

Developmental anomalies of the axis are commonly encountered, especially anomalies involving the odontoid process. Anomalies of the posterior elements are uncommon. We describe a unique case of agenesis of posterior elements of C2 with basilar invagination and atlanto-axial dislocation. An obese 8-year-old boy presented with symptoms of cervical myelopathy. Radiological workup revealed a cranio...

OBJECTIVE To evaluate the efficacy of anterior cervical decompression, fusion and titanium plate fixation in sub axial cervical spine injuries in respect of neurological outcome, postoperative stability and early rehabilitation. The Descriptive case series study was conducted at Department of Neurosurgery, Liaquat University Hospital, Jamshoro, Sindh Pakistan during year 2005 to 2007. METHODS...

Our goal is to describe a specific case of a general process gaining traction amongst biologists: testing biological hypotheses with biomimetic structures that operate in bioinspired robots. As an example, we present MARMT (mobile autonomous robot for mechanical testing), a surface-swimmer that undulates a submerged biomimetic tail to power cruising and accelerations. Our goal was to test the h...

background: fractures of femur are among the most important causes of mortality in musculoskeletal injuries. owning to lack of adequate research to compare various techniques of fracture stabilization, there has not yet been an agreement over a protocol to utilize a specific type of splint for femoral fracture immobilization. this study was thus conducted to compare the effects of simple and tr...

Mobile Robots are used to venture through types of environments where wheel slip is a threat. Wheel slip is a hazard to mobile robots in that it introduces error in dead reckoning measurement and in some instances causes the robot to halt is forward progress. To compensate for traction loss several methods are used to determine the terrain characteristics. One of these methods is Pacejka’s Tire...

PURPOSE Recent work has shown the safety and efficacy of halo-gravity traction as an operative adjunct. However, there are no reports specifically looking at halo-gravity traction in patients with skeletal dysplasia. Our purpose was to assess the safety and efficacy of traction in children with skeletal dysplasia who present with severe kyphoscoliosis. METHODS We retrospectively reviewed eigh...

This study aims to validate the accuracy of a cervical traction therapy simulation model by comparing the intervertebral separations of six asymptomatic male adults when traction was applied to their cervical spines. The subjects were tested on two mechanical traction devices, representing the inclined and sitting positions. A total of 55 radiographic images of their cervical spines were taken ...

OBJECTIVE To determine the influence of mechanical intermittent cervical traction on the autonomic system. DESIGN Prospective, cases series study. SUBJECTS Sixteen healthy volunteers without contraindications for cervical traction. METHODS Subjects received mechanical intermittent cervical traction in a sitting position under two traction forces (10% and 20% of total body weight). Electr...

A standard skeletal traction technique was applied to each major segment of the appendicular skeleton of ten fresh dog cadavers. Opposition points and anchorage points for the application of traction were determined for each skeletal segment. Traction was exerted by means of a micrometric traction stand, connected to the limb by bands or a stirrup. Traction was applied to the antebrachium and t...